Added README

Author: shreyasvedpathak

Linked List/README.md

@@ -0,0 +1,13 @@
+# Description
+
+Following are the 7 basic operations performed on Linked List.
+
+|Operation              |Description                                        |
+|-----------------------|---------------------------------------------------|
+|**`addLast()`**        |Adds item at the end of the List.                  |
+|**`addFirst()`**       |Adds item at the beginning of the List.            |
+|**`addAnywhere()`**    |Adds item anywhere in the List using Index.        |
+|**`removeFirst()`**    |Removes item from the beginning of the List.       |
+|**`removeLast()`**     |Removes item from the end of the List.             |
+|**`removeAnywhere()`** |Removes item from anywhere in the List using Index.|
+|**`display()`**        |Display List.                                      |

README.md

@@ -11,5 +11,8 @@
 
 ## Data Structures
 
+[**Description**](Linked%20List/README.md)
+
 1. [Linked List](/Linked%20List/linkedlist.py)
 2. [Circular Linked List](Linked%20List/circularLL.py)
+3. [Doubly Linked List](Linked%20List/doublyLL.py)